Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.

Domain-based Message Authentication, Reporting and Conformance (DMARC), builds on the successes of technologies such as DomainKeys Identified Mail (DKIM) and the Sender Policy Framework (SPF) to create an infrastructure that enforces policy on domain names that are visible to end users, and creates a feedback framework for identifying and tracking fraudulent use of domain names in email.

Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.

secnet allows multiple private networks, each 'hidden' behind a single globally-routable IP address, to be bridged together. It also supports individual client systems which may connect to multiple upstreams.

Dave Gnukem is an open source retro-style 2D scrolling platform shooter, inspired by and similar to Duke Nukem 1. It currently runs on Windows, macOS, Linux and various other platforms. It is written in C++ using SDL library and it features an integrated level editor as well. This game is not really a clone or remake, it is probably most akin to a parody.

IPMI allows remote monitoring and remote management of devices.